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Hydrogen Gas Collection Lab CE (6/6) A sample of solid magnesium ribbon, measuring approximately 2.5cm and weighing 0.037 g +/- 3% was allowed to react with an aqueous solution of hydrochloric acid
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Conclusion and Evaluation:
A sample of solid magnesium ribbon, measuring approximately 2.5cm and weighing 0.037 g +/- 3% was allowed to react with an aqueous solution of hydrochloric acid, with a concentration of 6 mol dm-3 in a 1000cm3 graduated cylinder. The sample of magnesium was wrapped in a cage constructed of copper wire, and mounted on a holed rubber stopper, which was inserted into the end of a gas measuring tube, with 14.90 cm3 +/- 0.3% of 6 mol dm-3 HCl(aq) already in the tube with the rest of the gas measuring tube being filled with tap water. The gas measuring tube was then inverted into the 1000cm3 graduated cylinder, in which there was 790 cm3 +/- 0.6% of tap water, and was allowed to react with the 6 mol dm-3 hydrochloric acid once it had descended down to where the magnesium strip lay since hydrochloric acid is denser than water (As told by teacher). This, in a vigorous reaction, produced a gas that ascended to the top of the gas measuring tube, and it can be said that it is mostly comprised of hydrogen gas, as per the following, balanced equation:
Mg(s) + 2HCl(aq) --> MgCl2(aq)
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